| 摘要 |
An automatic latch is mounted on the front of a self-loading boat trailer to the fixed upright framework that includes a bow-receiving cradle. The latch member has a central transverse pivot. The rear end of the latch has an upwardly and forwardly inclined hook, while the front end of the latch has a counterweight normally urging the hook in a raised position. The forward loading movement of the boat onto the trailer causes a boat eye mounted on the bow of the boat to deflect the hook into a lowered position until the counterweight returns the hook to a raised position so the hook interlocks with the boat eye. An adjustable handle is mounted on the framework, and it cooperates with a tension spring, where the spring is relaxed during a boat-loading operation, and the spring is loaded during a boat-unloading operation so that the latch automatically disconnects itself from the boat eye during unloading. An improved version of this automatic latch has the front end of the pivoted latch member fitted with both an inclined hook portion and a counterweight, while the rear end of the latch supports one end of a tension spring and the other end of this same spring is joined to the adjustable handle.
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